Regenerated cellulose fibers and preparation method thereof

A technology of regenerated cellulose and type A cellulose, which is applied in the chemical characteristics of fibers, rayon manufacturing, and rayon made of viscose, etc. It can solve the problems of environmental impact, consumption of large chemicals, and low utilization rate of raw materials.

Active Publication Date: 2015-06-24
河北艾科瑞纤维有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, since the production of regenerated cellulose fiber uses chemical fiber pulp as raw material, the pulping process of traditional chemical fiber pulp is still aimed at preparing high-purity cellulose, so that the utilization rate of raw materials is low, such as the utilization of wood The utilization rate of bamboo is only 40%, the utilization rate of bamboo is only 30%, and the utilization rate of hemp is only about 45%. In addition, a large amount of chemicals are consumed in the production process, and a large amount of waste is generated, which directly or indirectly affects the environment.
[0003] The traditional regenerated cellulose fiber is white, and it needs to be dyed in the process of making colorful textiles, or the method of injecting colored slurry before spinning is used in the fiber production process to produce fibers of different colors, but it is inevitable The production of dyed wastewater has caused pollution hazards to the natural environment, and repeated pollution accidents have always been the focus of attention throughout the country. Therefore, protecting the environment is the duty of every citizen.

Method used

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  • Regenerated cellulose fibers and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] Cooking: using bamboo as raw material, using pre-hydrolyzed sulfate method for cooking, cooking temperature 155°C, cooking 60 minutes under the condition of 0.5MPa pressure, the amount of alkali is 15% of the absolute dry raw material in terms of sodium oxide, and the degree of sulfidation is 8 %, the liquid ratio is 1:2.5; the degree of polymerization of the slurry after cooking is 1050;

[0072] Adjust the degree of polymerization: add sodium bromide and chlorine dioxide to the slurry after cooking, the amount of sodium bromide added is 0.05% of the absolute dry pulp, and the amount of available chlorine added is 2% of the absolute dry pulp. ℃ treatment for 0.6 hours, the adjusted degree of polymerization of wood pulp cellulose is 580, and the whiteness is 60%;

[0073] Acid treatment: It is necessary to pickle the pulp after adjusting the degree of polymerization with hydrochloric acid, the amount of hydrochloric acid is 3% of the absolute dry pulp, and the time is 9...

Embodiment 2

[0081] Cooking: use hemp as raw material to cook by kraft method, cooking temperature is 170°C, and cooking is under the condition of 0.7MPa for 100 minutes. The liquid ratio is 1:4; the degree of polymerization of the slurry after cooking is 550;

[0082] Adjust the degree of polymerization: Add sodium bromide and chlorine dioxide to the slurry after cooking, the amount of sodium bromide added is 0.01% of the absolute dry pulp, and the amount of available chlorine is 0.5% of the absolute dry pulp, at a temperature of 30°C Treated for 1.8 hours, the adjusted degree of polymerization of wood pulp cellulose is 450, and the whiteness is 35%;

[0083] Acid treatment: It is necessary to pickle the slurry after adjusting the degree of polymerization with hydrochloric acid, the amount of hydrochloric acid is 5% of the absolute dry slurry, and the time is 30 minutes;

[0084] Dipping: The pulp after pickling, desanding and concentration is soaked in sodium hydroxide solution containi...

Embodiment 3

[0091] Cooking: use wood as raw material, cook with pre-hydrolyzed sulfate method, cook at a temperature of 160°C, and cook for 80 minutes under a pressure of 0.6MPa. %, the liquid ratio is 1:6, and the degree of polymerization of the slurry after cooking is 850;

[0092] Adjust the degree of polymerization: Add sodium bromide and sodium hypochlorite to the slurry after cooking, the amount of sodium bromide added is 0.03% of the absolute dry pulp, the amount of available chlorine is 0.5% of the absolute dry pulp, and it is treated at a temperature of 40 ° C for 1.4 hour, the adjusted degree of polymerization of wood pulp cellulose is 500, and the whiteness is 50%;

[0093] Acid treatment: It is necessary to pickle the slurry after adjusting the degree of polymerization with hydrochloric acid, the amount of hydrochloric acid is 1% of the absolute dry slurry, and the time is 60 minutes;

[0094] Dipping: The pulp after pickling, desanding and concentration is soaked in sodium h...

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Abstract

The invention provides regenerated cellulose fibers and a preparation method thereof. The regenerated cellulose fibers are characterized in that the dry fracture strength is more than or equal to 1.85CN / dtex; the wet fracture strength is more than or equal to 0.90CN / dtex; the residual sulfur content is less than or equal to 25.0mg / 100mg; and the whiteness is 20-60%. The preparation method comprises the following process flows: cooking, adjusting the degree of polymerization, performing acid treatment, performing papermaking, impregnating, squeezing, crushing, ageing, yellowing, dissolving, filtering, defoaming, spinning, cutting, refining, drying and packaging. The regenerated cellulose fibers are also characterized in that the natural ingredients of plant raw materials are kept, the fibers show natural khaki without any dyeing treatment, and the whiteness is 20-60%. The fibers are soft in hand feeling, natural in luster and color, have good skin affinity, completely meet 'technical requirements on ecological textiles' (articles in direct contact with skins), and are significant in bacteriostatic and antibacterial effects, so that a novel type of fiber is provided for the textile field.

Description

technical field [0001] The invention relates to a regenerated cellulose fiber and a preparation method, in particular to a fiber prepared from one or two or more of wood, bamboo and hemp as raw materials. Background technique [0002] At present, since the production of regenerated cellulose fiber uses chemical fiber pulp as raw material, the pulping process of traditional chemical fiber pulp is still aimed at preparing high-purity cellulose, so that the utilization rate of raw materials is low, such as the utilization of wood The utilization rate of bamboo is only 40%, the utilization rate of bamboo is only 30%, and the utilization rate of hemp is only about 45%. In addition, a large amount of chemicals are consumed in the production process, and a large amount of waste is generated, which directly or indirectly affects the environment. . [0003] The traditional regenerated cellulose fiber is white, and it needs to be dyed in the process of making colorful textiles, or th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F2/06D01F1/10
Inventor 岳福升郑书华李振峰张焕志申佳常书利范梅欣刘会兵
Owner 河北艾科瑞纤维有限公司
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